Highly stretchable and stretch-induced fluorescence chromism self-healing materials based on boroxine and dynamic imine bond

Wang, Jing; Lai, Jian‐Cheng; Jia, Xiaoyong

doi:10.1039/d2tc01886a

Cited by 22 publications

(11 citation statements)

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“…The polymer could fully recover its mechanical properties after healing for 12 h at 70 °C, or healing at room temperature with 70% RH for 12 h. In another study, the elongation of boroxine system was tuned by the incorporation of PDMS and dynamic imine bond. 123 The combination of boroxine and imine bonds with flexible PDMS backbone achieved elongation at break of 4200% and tensile strength of 0.25 MPa, as well as self-healing at room temperature in 20 min. Similarly, self-healing polymers based on dynamic-covalent boronic esters exhibited facile reversibility of the networks and allowed intrinsic self-healing under ambient conditions.…”

Section: Self-healing Materials With Covalent Dynamic Bondsmentioning

confidence: 98%

“…It is also reported that combining boroxine with hydrogen bonding groups formed iminoboronate/boroxine-based polyurethane network with tensile strength of 11 MPa and elongation-at-break of 3%. The polymer could fully recover its mechanical properties after healing for 12 h at 70 °C, or healing at room temperature with 70% RH for 12 h. In another study, the elongation of boroxine system was tuned by the incorporation of PDMS and dynamic imine bond . The combination of boroxine and imine bonds with flexible PDMS backbone achieved elongation at break of 4200% and tensile strength of 0.25 MPa, as well as self-healing at room temperature in 20 min.…”

Section: Representative Intrinsic Self-healing Polymersmentioning

confidence: 99%

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Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

et al. 2022

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Self-healing materials open new prospects for more sustainable technologies with improved material performance and devices' longevity. We present an overview of the recent developments in the field of intrinsically self-healing polymers, the broad class of materials based mostly on polymers with dynamic covalent and noncovalent bonds. We describe the current models of self-healing mechanisms and discuss several examples of systems with different types of dynamic bonds, from various hydrogen bonds to dynamic covalent bonds. The recent advances indicate that the most intriguing results are obtained on the systems that have combined different types of dynamic bonds. These materials demonstrate high toughness along with a relatively fast self-healing rate. There is a clear trade-off relationship between the rate of self-healing and mechanical modulus of the materials, and we propose design principles of polymers toward surpassing this trade-off. We also discuss various applications of intrinsically self-healing polymers in different technologies and summarize the current challenges in the field. This review intends to provide guidance for the design of intrinsic self-healing polymers with required properties. CONTENTS 4.3.4. Waiting Time 5. Applications of Intrinsically Self-Healing Polymers 5.1. Intrinsic Self-Healing Polymers for Additive Manufacturing 5.2. Intrinsic Self-Healing Polymers for Envelope Applications 5.3. Intrinsic Self-Healing Polymers for Energy Storage 5.4. Intrinsic Self-Healing Polymers for Stretchable Electronics 6. Current Challenges and Future Perspectives 6.1. Trade-off between Self-Healing Kinetics and Mechanical Strength 6.2. Employing Complex Architectures and Combination of Dynamic Bonds to Surpass the Modulus−Self-Healing Rate Trade-off 6.3. Needs for in Situ Analysis of Self-Healing 6.4. Theoretical and Modeling Challenges 7. Conclusions and Outlook Author Information

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Section: Self-healing Materials With Covalent Dynamic Bondsmentioning

confidence: 98%

Section: Representative Intrinsic Self-healing Polymersmentioning

confidence: 99%

Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

et al. 2022

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“…Wang et al employed (3,5-diformylphenyl) boronic acid (DPBA) and NH 2 -PDMS-NH 2 to acquire PDMS-DPBA fluorescent self-healing elastomer based on double covalent bonds, as presented in Figure 6. [46] Boroxine bond provided a luminescence center and dynamic imine bond offered self-healing property. Meanwhile, the film also showed stretch-induced discoloration from green to cyan, which was attributed to the transition of fluorescence center from aggregation to dispersion state.…”

Section: Othersmentioning

confidence: 99%

“…Figure 6. a) The structure and the dynamic process of PDMS-DPBA, b) the mechanism for the self-healing process,and c) schematic illustration of stretch-induced fluorescence chromism. Reproduced with permission [46]. Copyright 2022, Royal Society of Chemistry.…”

mentioning

confidence: 99%

Preparation and Applications of Polydimethylsiloxane‐Based Fluorescent Materials

Dong

Zhong

et al. 2023

Macromol. Rapid Commun.

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In the past few years, fluorescent materials have received significant attention due to their fascinating luminescent properties and wide-ranging applications. Polydimethylsiloxane (PDMS) has also attracted the interest of many researchers due to its remarkable performances. The combination of fluorescence and PDMS will undoubtedly produce abundant advanced multifunctional materials. Although numerous achievements have been made in this field, there is still no review to summarize the relevant research. This review summarizes the state-of-the-art achievements made in PDMS-based fluorescent materials (PFMs). First, the preparation of PFM is overviewed following a classification according to the fluorescent sources, including organic fluorescent molecules, perovskite, photoluminescent nanomaterials, and metal complexes. Their applications in sensors, fluorescent probes, multifunctional coatings, and anticounterfeiting are then introduced. Finally, the challenges and development trends in the field of PFMs are presented.

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“…32,57−61 Moreover, the dynamic equilibrium between boroxine and boronic acids under mild conditions ensures boroxines to be used to prepare self-healable, processable, and even chemically recyclable supramolecular thermosets. 23,24,32,52,60 Therefore, we believe that high-performance PI-based supramolecular thermosets can be conveniently fabricated using boroxines as cross-linkers. Herein, we report PI-based supramolecular thermosets that can achieve rapid depolymerization at room temperature in mild acidic aqueous solutions.…”

Section: ■ Introductionmentioning

confidence: 99%

Chemically Recyclable Supramolecular Thermosets toward Strong and Reusable Hot-Melt Adhesives

Bao,

Yin,

Ding

et al. 2023

Macromolecules

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Chemically recyclable thermosets are an ideal substitute for traditional thermosets in the development of a circular economy and sustainable environment. However, the development of efficient and easy-to-achieve chemical recycling strategies remains challenging. Herein, a series of supramolecular thermosets that can be chemically recycled under mild acid conditions at room temperature are fabricated by cross-linking the polyimine polymers with dynamic boroxines (PI x -Boroxine). By tailoring the molar content of boroxines, the PI 1.2 -boroxine can exhibit a tensile strength of ∼30.6 MPa, a tensile yield strength of 33.0 MPa, an elongation at break of ∼111.6%, and a Young's modulus of ∼679.6 MPa. Because of the dynamic nature of boroxines and imine bonds, the PI x -boroxine supramolecular thermoset exhibits fast stress relaxation behavior, which enables them to have good reprocessing ability. These unique features can also guarantee the PI x -boroxine supramolecular thermosets to be a highperformance reusable hot-melt adhesive. The maximum lap shear strength of the PI x -Boroxine-based hot-melt adhesives in stainless steel bonding adhesive can reach ∼18.6 MPa, which is comparable to that of commercial hot-melt adhesives. Meanwhile, the PI x -Boroxine-based hot-melt adhesives can be reused at least 10 times with only a small amount of reduction in lap shear strength. More importantly, the PI x -boroxine supramolecular thermosets can be easily depolymerized in a 0.1 M HCl/H 2 O solution at room temperature. Further, the monomers can be easily and efficiently separated by a simple separation procedure. The recovered monomers can also be reused to fabricate new PI x -boroxine supramolecular thermosets without losing their mechanical properties. This work provides a new design strategy to develop high-performance thermosets with easy-to-achieve chemical recyclability, which will contribute to the sustainable development of modern society.

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Highly stretchable and stretch-induced fluorescence chromism self-healing materials based on boroxine and dynamic imine bond

Abstract: A new self-healing luminescent polymer called PDMS-DPBA-5000 was synthesized by combining the double covalent bond of boroxine with imine bond. The formation of boroxine bond will offer a luminescence center,...

Cited by 22 publications

References 53 publications

Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

Intrinsically Self-Healing Polymers: From Mechanistic Insight to Current Challenges

Preparation and Applications of Polydimethylsiloxane‐Based Fluorescent Materials

Chemically Recyclable Supramolecular Thermosets toward Strong and Reusable Hot-Melt Adhesives

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